Add check for NullTruthValue in cog-tv? predicate
Add check for NullTruthValue in cog-tv? predicate

inflector/atomspace,misgeatgit/atomspace,yantrabuddhi/atomspace,misgeatgit/atomspace,rTreutlein/atomspace,misgeatgit/atomspace,misgeatgit/atomspace,inflector/atomspace,inflector/atomspace,inflector/atomspace,AmeBel/atomspace,rTreutlein/atomspace,ArvinPan/atomspace,misgeatgit/atomspace,AmeBel/atomspace,yantrabuddhi/atomspace,ArvinPan/atomspace,rTreutlein/atomspace,yantrabuddhi/atomspace,AmeBel/atomspace,rTreutlein/atomspace,AmeBel/atomspace,AmeBel/atomspace,rTreutlein/atomspace,ArvinPan/atomspace,yantrabuddhi/atomspace,yantrabuddhi/atomspace,inflector/atomspace,ArvinPan/atomspace